预应变亚稳态奥氏体不锈钢（S30408）深冷低周疲劳性能

王一博,丁会明,郑津洋,陆群杰,王振宇,徐平,陈志伟

Cryogenic low-cycle fatigue performance of pre-strained metastable austenitic stainless steel (S30408)

Yi-bo WANG,Hui-ming DING,Jin-yang ZHENG,Qun-jie LU,Zhen-yu WANG,Ping XU,Zhi-wei CHEN

表 3 S30408预应变材料与母材Manson-Coffin方程的拟合参数

Tab.3 Manson-Coffin equation fitting parameters of S30408 base metal and pre-strain metal

试样 E /MPa b c εf′ σf′ /MPa 母材 173 000 −0.080 −0.448 0.0230 1972 293 K预应变 163 404 −0.058 −0.349 0.0120 1967 363 K预应变 160 130 −0.059 −0.480 0.0095 1758